Improved lifting-jack



tnitd Sima @wat @twine y LEVI W. EIFIELD, 0F WORCESTER, MASSACHUSETTS, ASSIGNOR T() ENOCH EARLE AND LUKE K. DAVIS, OE' SAME PLACE.

Lette/rs Patent No. 101,450, dated April 5, 1870.

IMPROVED LIFTING-J' ACK.

The Schedule referred to in these Letters Patent and making part of the lame.

I, Ln'vr W. FIFlELn, ofthe cit-pand county of Tol-cester, State of Massachusetts, have invented certain Improvements in Lifting-Jacks, of which .the following is a specification'.

Nature and Objects of my I m'ent'ion.

My invention is designed to meet a common want in furnishing a handy, ready means of raising wheels by theiraxles, and similar purposes, and having an arrangement for adjusting it easily to various heights, as required.

Description of the Accompanying Drau-ings.

Figure l is a side view of a machine embodying my invention.

Figure 2 shows a section at the line :t y, as seen from above.

General Description.

A is the base supporting the standards B B', between which plays the slide C Aand the lever D, the

latter turning ou a stationary piu or fulcrum at E,

and having its short end at F connected by the pieces G Gto a pin, H, which catches in the notchesccc cc in the slide C, the guard I preventing the pin from falling away, and allowing the shifting of the pin into any ot' the notches, thus adjusting the slide to various heights, the lever D being so arranged with the conneotons G G that when it is depressed, as at D', the

joint F shall pass a line from the fulerum at E to the Witnesses:

A. BROWN, J. G. ARNALL. 

